There's a sense of desperation among wine grape growers in Victoria's north, which the peak wine body says is reflective of the situation across the country.

Northern Victoria is just weeks away from harvest but growers fear they will struggle to stay in business.

Phillip Englefield grows wine grapes at Robinvale, in Victoria's north-west, and is the chairman of Vintage Traders Australia, an organisation that helps growers sell their grapes.

He says the industry is on the brink of collapse.

"The industry is in the worst position, particularly from a grape growing perspective, that it has ever been in," Mr Englefield said.

"There could well be significant volumes of fruit not harvested.

"There could be significant numbers of growers that exit the industry willingly or unwillingly and there's nothing on the horizon at this stage that gives growers that are really struggling the hope or belief to hang on."

In December, three of Australia's largest wineries - Accolade Wines, Pernod Ricard and Treasury Wines Estate - announced they would slash prices by up to 50 per cent.